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EP 4 070 412 A1

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(43) Date of publication: 12.10.2022 Bulletin 2022/41 (21) Application number: 20829242.5 (22) Date of filing: 02.12.2020

(51) International Patent Classification (IPC):  H01R 4/68(2006.01) H02G 15/34(2006.01) H01R 4/46(2006.01) H01R 43/00(2006.01) H01R 43/04(2006.01) (52) Cooperative Patent Classification (CPC): H01R 4/68; H02G 15/34; H01R 43/04; H01R 4/46; Y02E 40/60 (86) International application number: PCT/US2020/062793 (87) International publication number: WO 2021/113291 (10.06.2021 Gazette 2021/23)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 06.12.2019 US 201962944627 P 29.05.2020 US 202063032281 P (71) Applicants: Massachusetts Institute of Technology Cambridge, MA 02139 (US) Commonwealth Fusion Systems LLC Cambridge, MA 02139 (US)

(72) Inventors: HARTWIG, Zachary Jamaica Plain, Massachusetts 02130 (US) MICHAEL, Philip Cambridge, Massachusetts 02139 (US) SORBOM, Brandon, N. Cambridge, Massachusetts 02138 (US) IRBY, James Natick, Massachusetts 01760 (US) VIEIRA, Rui Billerica, Massachusetts 01821 (US) BECK, William Watertown, Massachusetts 02472 (US) SALAZAR, Erica Cambridge, Massachusetts 02139 (US) FRY, Vincent Waltham, Massachusetts 02453 (US) (74) Representative: Murgitroyd & Company  Murgitroyd House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)